Extensible safety-cartridge



(No Model.)

P. P. REASE.

EXTENSIBLE SAFETY CARTRIDGE. No. 331,912. Patented Dec. '8, 1885.

UNITED STATES PATENT @rrrcn.

FRANK P. REASE, OF PITTSTON, PENNSYLVANIA.

E XTENSI BLE SAFETY-CARTRI DG E.

SPECIFICATION forming part of Letters Patent No. 331,912, dated December 8, 1885.

Application filed June 13, 1885.

To aZZ whom it may concern.-

Be it known that I, FRANK P. REASE, a citizen of the United States, residing at Pittston, in the county of Luzerne and State of Pennsyl- Vania, have invented certain new and useful Improvements in Extension Safety-Cartridges and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, in which Figure l is a sectional view showing the application and use of my invention. Fig. 2 is a side elevation of the cartridge-casing, showing it extended or the two sections thereof drawn out their entire length; Fig. 3, a detail view of the inner section of the cartridge-casing; Fig. 4, a similar view of the outer section. Fig. 5

represents a detail view of the wad to be placed on top of the rifle-powder in the safety-top and blasting-barrel receiver; Fig. 6, a detail view of the perforated wad.

The present invention has for its object to provide an extensible safety cartridge for blasting purposes; and it consists in the details of construction, substantially as shown in the drawings, and hereinafter described and claimed.

In the accompanying drawings, Fig. 1, is shown a block of coal having the usual drillhole, in which is inserted the cartridge.

This cartridge is composed of two sections, A B, of paper, pastehoard,or any suitable material, either water-proof or not, as found desirable, the sections being cylindrical and of any size, to fit one within the other, as shown. The section A, which I term the outer section, has its bottom or outer end closed air-tight, and is of sufficient diameter to receive the smaller section, B. The section B is also closed at its outer end, and is provided with a short tube, 0, to receive the end of the blasting-barrel D. This tube 0 is formed on the end of the cartridge-section B, and is a part thereof, the top of the section on line with the tube being perforated, so that communication is had between the two when the cartridge is filled with blasting-powder and the tube partly filled with rifle-powder, as shown in Fig. 1. The blasting-barrel D is also filled with rifle-powder, and its end is inserted in Serial No. 168,589. (No model.)

the wad E of paper being placed between the powder in the tube 0 and the powder in the end of the barrel. If preferred, the wad may have a central perforation, as shown in Fig. 6, the blasting-barrel, filled with rifle-powder, resting on top of the perforated wad just previous to the igniting of the powder in the same, which will cause the explosion in the cartridge.

In loading and preparing cartridges for use the receiver 0 of the section B is first charged with rifle-powder, after which the wad E is placed thereon, and then the section A is filled with blasting-powder. The section B is partly filled with blastingpowder and inserted in section A, and the two sections of the cartridge shoved together until the blasting-powder therein shall be united solidly. Then perforate the wad E with a needle,wire, or other suitable means, and insert the end of the blasting-barrel D, filled with rifle-powder, in the receiver 0, so the same will fit closely and rest firmly on top of perforated wad. The cartridge is now soaped upon the outside, as is also the blasting-barrel, for about a distance of two inchesabove the receiver, when the drill-hole prepared to receive it, and can be tamped and fired off with safety to the limb, body, and life of the miner or person using the same. The cartridge, being formedin two sections, one fittlng within the other, is rendered extensible, thereby enabling the cartridge to be extended or contracted to any desirable size or length, thus saving waste of blasting-powder, time, and labor in coal-mining. The paper of the cartridge can be made perfectly water-proof, the outside section being preferably of double thickness of paper, which will be useful in very wet places in coalmines in keeping the powder dry. The bottom and top of the cartridge will always be inside of the cartridge from the drill-hole or mine and work its way upward through the powder in the cartridge-receiver and blastingbarrel and escape, thereby preventing prema- 1 ture explosions, which are caused by the ignition of the escaping gas at top of blasting-barrel while the miner is engaged in tamping the cart-he tube 0, which I shall term a receiver, tridge in the drill-hole.

perfectly air-tight, that no gas can penetrate.

cartridge is then ready to be inserted in the I Having now fully described my invention, In testimony whereof I have signed this what I claim as new, and desire to secure by specification in the presence of two subscrib- Letters Patent, ising witnesses.

An extensible niining-cartridge consisting 5 of two sections closed at their outer ends and fitting one within the other, the closed end of 1 one section having a tubular receiver formed Witnesses: thereon and constituting a permanent part of FRANK P. REAP, said section, substantially as and for the pur- FRANK O. MOSIER. IO pose set forth.

FRANK P. REASE. 

